*,
body {
    margin: 0;
    padding: 0;
}

ul,
li {
    list-style: none;
}

img {
    display: block;
}

html,
body {
    height: 100%;
}

.clearfix:after {
    content: "";
    display: block;
    clear: both;
}

#main {
    height: 100%;
    display: flex;
    flex-direction: column;
}

#content {
    flex: 1;
    overflow: auto;
    margin-bottom: 50px;
    position: relative;
    display: flex;
    flex-direction: column;
}